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vagabundo [1.1K]
4 years ago
12

What is the solution of X2-9x+18=0

Mathematics
1 answer:
Contact [7]4 years ago
8 0
X² - 9x + 18 = 0
x = <u>-(-9) +/- √((-9)² - 4(1)(18))</u>
                     2(1)
x = <u>9 +/- √(81 - 72)</u>
                 2
x = <u>9 +/- √(9)
</u>            2
x = <u>9 +/- 3</u>
           2
x = 4.5 <u>+</u> 1.5
x = 4.5 + 1.5      x = 4.5 - 1.5
x = 6                  x = 3
<u />
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The answer to your question is: Yes, it is a solution

Step-by-step explanation:

           

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Process, replace the point in the line

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In interval notation that is (-\infty,\infty).

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4 years ago
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